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WINDSOR, UNITED KINGDOM - JUNE 27: Princess Diana Presenting A Prize To Prince Charles' Polo Manager Ronald Ferguson (father Of Sarah Ferguson) At Polo, Windsor. Her Dress Is By Fashion Designer Victor Edelstein But She Has Had It Adapted To Remove A Peplum Skirt. (Photo by Tim Graham Photo Library via Getty Images)

WINDSOR, UNITED KINGDOM - JUNE 27:  Princess Diana Presenting  A Prize To Prince Charles' Polo Manager Ronald Ferguson (father Of Sarah Ferguson)  At Polo, Windsor. Her Dress Is By Fashion Designer Victor Edelstein But She Has Had It Adapted To Remove A Peplum Skirt.  (Photo by Tim Graham Photo Library via Getty Images)